From a closed GSA Auction listing for a USN whale boat:
HULL MATERIAL: GRP-SINGLE SKIN; FEATURES: OPEN BOAT USED FOR SHIPS~ RESCUE, FULL FLOTATION, D-RUBBER FENDERING, LIFTING SLING (CERTIFICATION OUT OF DATE); ON WOOD CRADLE (INCLUDED IN SALE);***ALL WEIGHTS AND MEASUREMENTS PROVIDED ARE APPROX. AND MAY VARY***OVERALL LENGTH (APPROX): 26.08 FT; MAX BEAM (APPROX): 8.25 FT; DRAFT (APPROX): 2.6 FT AT FULL LOAD DISPLACEMENT; DESIGN HOISTING WEIGHT (APPROX): 5400 LBS; FULL LOAD DISPLACEMENT (APPROX): 8570 LBS; SPEED (APPROX): 7 KTS AT FULL LOAD DISPLACEMENT;
These things are embarrassingly slow. We took one that was for sale out on the lake. All the fast boats were passing us like we were standing still.